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Eremogone franklinii

Franklin's sandwort

needle-leaf sandwort, prickly sandwort

Habit Plants ± cespitose, bluish green, not glaucous, with woody base. Plants strongly mat-forming, glaucous, often with woody base.
Stems

erect, 3–10(–15) cm, glabrous.

erect, 7–25(–30) cm, densely stipitate-glandular distally.

Leaves

basal leaves persistent;

cauline leaves in 6–10 pairs, closely overlapping, not reduced;

basal blades arcuate-spreading, needlelike, (0.6–)1–2 cm × ca. 1 mm, ± rigid, herbaceous, apex spinose, glabrous, not glaucous.

basal leaves persistent;

cauline leaves in 1–3 pairs, abruptly reduced distal to lowest pair;

basal blades ascending or often arcuate-spreading, needlelike, (0.5–)1–2.5(–3.5) cm × 0.5–1.5 mm, rigid, herbaceous, apex spinose, glabrous to puberulent, glaucous.

Inflorescences

3–45+-flowered, usually congested, subcapitate cymes.

5–25+-flowered, open cymes.

Pedicels

ca. 0.1–3(–4) mm, glabrous.

3–25 mm, stipitate-glandular.

Flowers

sepals 1–3-veined, linear-lanceolate, (5–)8.5–12 mm, not enlarging in fruit, margins narrow, apex acuminate, glabrous;

petals white, oblong-lanceolate to narrowly spatulate, 7–9 mm, 0.8–1.1 times as long as sepals, apex rounded to blunt;

nectaries not apparent.

sepals 1–3-veined, lateral veins less developed or all obscure, ovate, 3–4.5 mm, to 6 mm in fruit, margins broad, apex usually obtuse to rounded, abruptly acute, sparsely to densely stipitate-glandular;

petals white, obovate to oblanceolate, 4.5–10 mm, 1.5–3 times as long as sepals, apex rounded;

nectaries as lateral and abaxial rounding, with slight lateral expansion, at base of filaments opposite sepals, 0.3 mm.

Capsules

2.3–3.3 mm, glabrous.

5–9 mm, glabrous.

Seeds

black, pyriform, 1.2–1.7 mm, tuberculate.

yellowish tan to gray, ellipsoid-oblong, 1.8–2.5(–3.2) mm, tuberculate;

tubercles rounded, elongate.

2n

= 22.

Eremogone franklinii

Eremogone aculeata

Phenology Flowering summer–early fall.
Habitat Rocky slopes, alluvium, volcanic areas
Elevation 1500-3400 m (4900-11200 ft)
Distribution
from FNA
ID; NV; OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; ID; MT; NV; OR; UT; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Some specimens from north-central California and southwestern Oregon have been named Arenaria pumicola var. californica. R. L. Hartman (1993) considered those plants to be robust forms of Eremogone aculeata, not deserving formal recognition. Based on work by M. F. Baad (1969), they warrant further study.

Reports of Eremogone aculeata from Arizona, New Mexico, and Wyoming are erroneous.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Inflorescences tightly congested cymes; pedicels 0.1-1(-3) mm; sepals 8.5-12 mm; petals 0.8-0.9 times as long as sepals
var. franklinii
1. Inflorescences somewhat congested cymes; pedicels 1-4 mm; sepals 5-8 mm; petals 1-1.1 times as long as sepals
var. thompsonii
Source FNA vol. 5, p. 66. FNA vol. 5, p. 59.
Parent taxa Caryophyllaceae > subfam. Alsinoideae > Eremogone Caryophyllaceae > subfam. Alsinoideae > Eremogone
Sibling taxa
E. aberrans, E. aculeata, E. capillaris, E. congesta, E. eastwoodiae, E. fendleri, E. ferrisiae, E. hookeri, E. kingii, E. macradenia, E. pumicola, E. stenomeres, E. ursina
E. aberrans, E. capillaris, E. congesta, E. eastwoodiae, E. fendleri, E. ferrisiae, E. franklinii, E. hookeri, E. kingii, E. macradenia, E. pumicola, E. stenomeres, E. ursina
Subordinate taxa
E. franklinii var. franklinii, E. franklinii var. thompsonii
Synonyms Arenaria franklinii Arenaria aculeata, Arenaria fendleri var. aculeata, Arenaria pumicola var. californica
Name authority (Douglas ex Hooker) R. L. Hartman & Rabeler: Sida 21: 240. (2004) (S. Watson) Ikonnikov: Novosti Sist. Vyssh. Rast. 10: 139. (1973)
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